Can anyone tell me what this plant is?

My son and I dug up this garden spot last summer, and we planted zinnias, marigolds, eggplant, and a pack of wild flower seeds. This plant didn't come up last year, but has grown big this spring. I have no clue what it is... Any help would be appreciated...

Well, I got all paranoid, so I went out and broke off a leaf and smelled it. It smells like a carrot, whatever that means. LOL! I have no idea. Lets just hope the cops don't knock on my door anytime soon...

Oh my God! This is insane. I have no idea where it could've come from. Yes, I have bird feeders, my neighbors have bird feeders. I just can't believe this... There were two more smaller ones just like this one, and since I didn't know what they were, I pulled them up and saved this one just to see what it become. I just cannot believe this. LOL!

One grew in my garden, curtesy of bird feeder - the policeman who lived next door asked if he could have it when it was fully grown (ie ripe). We had a good laugh about it.
It doesn't actually look like that sort of 'weed' to me. Have a look at google images.

Ha Ha Silly me!!! Perennial means they just keep coming back every year, What I meant was Bi-annual it grows one year and flowers the next. But it does look like a meadow weed that birds may have dropped, I have yellow poppies in my garden that I have never planted so birds may have left them for me, they look nice but Oh! do they spread, I try to keep them down by dead-heading before the seeds fall.

Oh, thank you, Bob, I wasn't quite sure what you meant. Someone said it could possibley be Queen Anns Lace, whatever that is. I dunno. I just can't wait for it to bloom so I can hopefully put an end to my curiosity with this mystery plant!